Ironically, I see potential in this NOT for debugging. Sure, I can always just go into debug and help me find some secret items or what have you in the map, but simply going into the editor and checking those tiles out are easier and more of a convenience for me.
Please add more customization with this script...User friendly customization I mean.
Like maybe have the use of pictures or an HUD for something like this instead of the windowskin (Perhaps a choice between the two in a config section? ), and if you haven't already, set a Debug flag with this in a config...